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Table 1 Metabolite distribution by molecular mass across metabolic encyclopaedias

From: Metabolome searcher: a high throughput tool for metabolite identification and metabolic pathway mapping directly from mass spectrometry and using genome restriction

Molecular weight range (Da) Number of compounds in Metacyc Number of compounds in KEGG
50-99 254 267
100-199 1,731 2,402
200-299 1,050 2,614
300-399 842 2,575
400-499 461 1,150
500-599 311 719
600-699 169 337
700-799 199 201
800-899 198 232
900-999 133 160
>1,000 119 224
Total 5,467 10,881